feat: Add DKMS support for Depot-managed kernel modules

- Introduced a new `dkms` module in the installation helpers.
- Updated `BuildType` enum to include `Dkms`.
- Enhanced `PackageSpec` to validate DKMS-specific fields and added methods to retrieve effective DKMS names, versions, and install directories.
- Implemented DKMS build and installation logic in a new `dkms.rs` file, including staging source trees and lifecycle scripts.
- Added runtime support for managing installed DKMS modules, including autoinstall and removal functionalities.
- Created tests to validate DKMS parsing and module management.

src/commands.rs

@@ -2501,6 +2501,7 @@ fn run_direct_install_request(
             // 3.1 Copy license files into staged tree
             staging::add_licenses(&src_dir, &destdir, &pkg_spec.package.name)?;
             install::scripts::stage_scripts_from_spec_dir(&pkg_spec, &destdir)?;
+            builder::stage_generated_lifecycle_scripts(&pkg_spec, &destdir)?;
         }
 
         destdir